Any or All

[jmfrancofraiz]

It'd be nice if you could set the type of combination you want to check for presence when there are several addresses. As far as I could test, if you use several comma separated addresses, true is return when ALL are present, false otherwise. I'd like the node to return true if ANY is present. Maybe you could add a new setting to set ANY or ALL, or maybe some type of notation for the Devices setting, like "(mac1 || mac2) && mac3"...

[borpin]

I have submitted PR #9 which includes a new emitter that reports every ping so you can use the result as required.